According to the Bill of Rights and the US Constitution, ACTA violates our officially guaranteed rights without due process of law or probable cause. The first amendment states that we have a right to free speech and free press, the only way that can be restricted is if there is a "clear and present danger" ie. rallying the nation to overthrow washington or publicly broadcasting military plans. they cannot monitor us because that would violate the ninth amendment that guarantees us a right to privacy. And since everything uploaded to the internet is internationally owned so the United states has no power to shut down any foreign site or restrict any content. unless it is based in the US

Ok, technically ACTA says that if you learn something from somebody by paying for it and then you try and teach it to somebody else for free you'd be a criminal. Say for example your parents learned something in a school which they paid for, and tried to teach it to you for free, they would technically be criminals under ACTA.